Combined control and brake for sewing-machines.



UNITED s'rafrns an rnc PAUL I. nenn, or HoBoKEN. New massif, AND WILLIAM A. soNnN, or BROOKLYN,

, New Yoan. Y

COMBINED CONTROL A'Nn BRAKE For, SEWING-MACHINES.

Specification of Letters Patent.V atented Sept, 2 4, 1918.

' application feed July 12, una seran No. 244571.

To @ZZ whom 'it may concern:

Be it known that we, PAUL' P. linnn and YWILLIAn A. SONEN, both citixens of the 4 machines, and has for a main object the provision of a combined control and brake which may be use d in connection with power operated sewing machines, wherein an electric motor andfa rheostat for regulating the current are employed, and wherein a vertical treadle operated shaft is arranged as an ele,- ment through which toy control the operation of the 'rheostaty and.-by which, simultaneously with the denergization of; the rheostat to effect a direct braking action on the motor shaft braking pulley. p-

further olneet oI our invention-is to provide a novel casing v tor the accommodation andsu'pportof the working parts in compact arrangement so as. to take upqust as little space as possible consistent with the Y'objects' in view; to provide the casing with novel detachable doors tonne of which lthe rheostat is secured; and also to provide a standard or'support of vsimple construction,

to which the casing as a whole withthe partsvl 'associated therewith may be quickly and readily attached and detached.

lWith these objects 1n view and' others, the Invention residesin thedetalls ofi construc-4 tion and in the arrangement and combina'- tion of parts hereinafter described, defined vm the claims, and Illustrated in the; accompanying drawings, forming a part of this` specilication; and it will be umlersto'od'that` changes and alterations in theprecise embodiment of the invention hereindisclosed,

may be made, to which changes and altera- -tions `theinventors are entitled, provided the same are effected within the scope of what is claimed.

In the accompanying drawings -Fignre 1 is aside elevational. view of our device, to- 'gethei with the operating means therefor, the same being here shown as supported" upon-a standard. p Y

Fig. 2 is a vertical sectional view, taken in the direction ofline 2-,2 of 1.

Fig.. 3 is a cross sectional View, taken in the direction of line 2%3 of Fig. 1. Fig. 4 is a similar view, taken in the direction of line 4-4 of Fig. 1.

Fig. 5 is a detail view of the rheostat.

The present embodiment of the invention i is shown in connection with a standard or. support designed for use either as one of the standards for any common type of sewing machine or for a worktable or bench of the character used in factories for the support in consecutive order of a plurality of sewing machines.

The standard rconsists of a casting having a bottom cross piece 6, formed at each end f formed upon its top end a led-ge or flange 11.

The casing includes the parallel side plates 12 and 13, a bottom plate 14, and a top plate 15, the said side plates 12 and 13 extending upwardly for a'distance beyond the'top platev 15 and having their ends 1G bent outwardly at right angles so as to be adapted to lie fiat upon the ledges as 11, for the support of the casing in a position depending from the projeetions 10 and between the same. One of the side plates, herein shown as side plate 12, is made with an outward deformation 17, provided with inlets as 17', to allow the entrance of air for cooling the rheostat. Laid flat upon the horizontal end portions'l is a bridge plate or platform 18, upon which is`T` 'bolted the motor 19. The ends 16 together with the bridge plate 18 are removably secured to the ledges 11 bymeans of bolts 2O and'securingfnuts 20. 'v The two remainingsides of the casing are removable and consist of door plates 21 and 22 ,of such extent as 'to lie flat against the edges of the side plates 12 and 13, and of the bottom plate 14 and the top plate 15. To

secure these removable vdoors in position,v there are provided in'the bottom plate 14 spaced from the opposite edges thereof, recesses as 2 3, receptive of .the ends of the curved arms 24 `termed integral with said doors." I The top ends of the doors are snapped behind hooked detents formed on the opposite ends of the spring plate 26, which extends across the top plate 15 vand is secured thereto by screws as 27 (Fig. 3).

Arranged to reciprocate verticallyl through suitable openings 'provided' in the bottoni 14, and top 15, midway their length, is a shaft 28, the upper end 29 of which is bent outwardly and upwardly (Fig. 2) at an angle, terminating in a flat vertical end .30, to which is riveted the reduced end 3l ofthe shoe or brake plate 32. The top end of .this shoe is formed arcuate and beveled crosswise to engage the V-shaped recess 33, provided in the periphery of the driving pulley 34, which is fast upon the motor shaft 35. Engaged in the adjacent peripherical recess 36 of the driving pulley is thebelt 37 by which motionis imparted to the machine in the usual way. Below the bottom plate 14,l the shaft 28 is reduced to a flat surface 38 to accommodate the end of theleverl 39, the said end being provided lwith a slot 40, in which Yworks a pin 41 projecting from the face 38, and by which'operative connection is provided.

The opposite end of `the lever 39 is pivoted at'42 to the inner side of the upright 9. Pivotally engaged with this lever at 43, intermediate its length, is an angular link 44 provided with a pin 45 projecting therefrom.

i at right-angles. lSecured. to this pin at 46 is the rear end of a foot treadle 47, which is formed near its forward end with downturned'spaced ears or lugs 48, rockably journaled upon a shaft 49. This shaft 49 may rigidly project from the bottom cross member or connect like parts of two adjacent standards. Mounted around the shaft 49 between the ears 48 is a spiral spring 50, having one end connected with said shaft and the other end extending rearwardly underneath the foot treadle in such manner as to normally hold the foot treadle in elevated position with the shoe 32 in rm engagement with the braking face of the driving pulley. Y

Within the casing there is transversely secured to but insulated from the shaft 28 a conducting plate 51, the rear end of which.

is offset toward the door plate 21,

yand terminates in a head 52 adapted to receive a carbon 53, 1against the rear end of which presses a spring 54, riveted at 55 to 55 said plate 51, in .siich manner as to hold said carbon in position for engagement with a series of contacts or buttons which project Yin close vertical alinement from` the inner side of the rheostat 56. The rheostat is supported at its corners upon posts 57 carried byv the door plate 21. Of the contacts, the lirst two 58, from the top, are without electrical connections, while the remaining contacts 59, herein shown as 4 in number, are provided withelectrical connections in the usual way to pass the current tela terminal contact 60, arranged near thetopighthand side of. the rheostat device. -Termina-l contact -60projects in position to be engaged. by a detent conductor 6l, secured to theV underside of the binding .post 62, arranged who e arrangement is such that when the4 foot treadle 47 is depressed to withdraw the shoe 32 from theidrivi'ng pulley, the conducting plate 51 will draw the carbon 53- across the ends of the vcontact buttons 59 for energizing the motor 29. The electric connections. from the buttons 59 are`obviously l dii'erent as may be necessary `to regulate the velocity of the current, so that the motor may operate in four diilerent speeds. Thus when the carbon engages the first top button 59, the machine will be driven at a certain speed; whenv it engages the secondaI higher speed will be obtained; and so on, each successive button toward thebottom producing an increase in speed. Two non-electrically connected buttons 58 are provided in order to have a contact support for the carbon until theshoe wholly withdrawn from the driving pulley.

The current may be tra ccd from a source of power as P through a ,wire 66 to the motor 29, from thc motor through a wire 67 tothe binding post 63, thence through the resilent conductor 64, arm 6.5, transverse plate 5l, carbon 53, buttons 59, they return current being eliected through terminal contact 60, dctent 6l, binding post 62, and wire GS bach to the source olf power.

From thc foregoing description taken in connection with the accompanying drawings, it will be manifest that under the depression of the ioot treadle 47. the brake shoe 32 will be drawn away from the driving pulley, and that simultaneously therewith the carbon will be carried downwardly into engagement with the rheostat buttons to ope nate the motor and consequently the machine, the rapidity of operation depending upon the degree or the depression `or the foot treadle. It will also be seen thatimmediately pressure is removed from the treadle 47v the spring 5() will rep'ositicn thev parts, bringing the carbon into engagement with the non-conducting buttons and simultaneously therewithiorcing the brake shoe 32 into engagement; with the driving pulley for bringing the mechanism instantly to nesvt.

Having thus described our ninvention what we claim is t-- f l 1. ln a sewing machine standard 'in combination, spaced-apart confronting ledges, aY

' in above its top plate to engage over said extending through said casing in alinement with said contacts, a transverse conducting plate carried by but insulated from said shaft, conductor means carried by said transverse plate adapted to engage said contacts in succession, treadle operated means carried 'by the standard for reciprocating said shaft, a motor having a brake pulley mounted upon said side members over said ledges, a shoe carried by saidshaft to engage and disengage .saidv brake pulley` Aconnections 'to complete. a circuit through said motor, said transverse. conducting plate, and said rheostat, the circuit being opened an'd closed accordingly as said shaft is actuated for the engagement'and disengagement of said shoe with said brake pulley.

2. In a device .of the class described, a casing having its opposed side members extending above its top'f'nlate and. adapted to sustain,the-casing in* spending position, a removable door plate for said casing,a rheoj stat bolted to the 'inner side of., said door plate yand provided .with a' series -of'contacts arranged in vertical alinement` a pair of binding posts arranged in ,but insulated from the to plate of 'said casing, a vertically motab e shaft extending through the top and bottom plates ofsaid casing in aline ment lwithv said contacts, a transverse conducting plate carried by but insulated from said shaft, conductor means removably en gaged with said transverse'platefor making ontact 'th' said buttons in succession ac- ,ordingly as said shaft is actuated, a resilient conductor between one of said binding posts and said transverse conductor, a ter.-V

minal contact carried i' by said rheostat, a"

conducting detent carried by the other binding post and adapted to engage said terminal contact when said movable door is a plied, a motor, means for connecting said binding posts in `circuit with the motor and source of current supply, and spring pressed treadle operated means connected'with theA lower end of said shaft whereby to actuate the same to effect engagement with the vecntacts in succession,said spring ressed treadle operated means normally hl ing said shaft with the conductor means out of engagement With said buttds.

. 3. In a device of the class described, a

casing haring its opposed sides prolongated beyond-its top plate and a pted to act as hangers for the support of tne casing in depending position, recesses cut in the top surface of the casing bottom plate spaced from the opposed edges thereof, opposed Aremovable' door plates adapted to lie flush against the edges of the 4casingside plates and the top and bottom plates thereof and provided with inwardly curved armsformed to enter said recesses for. the support of the door plates upon the' said bottom plate, a spring plate secured lacross the top plate and formed with detent ends behind which the removabledoor plates' may be snapped against displacernent,v a rheostat bolted to the inner side of one door plate, a pair of binding posts carried by but-'insulated from the top plate of said casing, a detent conductor carried by one binding post, a terminal contact'carried by saidvrheostat to engage said detent when the door plate is set in position, a'series of contacts` carried by said rheostat in vertical arrangement, a vertical reciprocable shaft extending through .Said Casing-,in alinemcnt with said contacts, a transverse conducting plate carried by but insulated from said shaft and adapted to make engagement with said buttons in succession accordingly as the shaft is actuated,

a resilient conductor connected between the' other binding post and said transverse plate, and connections with said binding posts to elose a circuit whenever the shaft is actuated to eect engagement between said transverse 4 conducting plate and any one of said rheostat contacts.

Intestimony whereof we have signedy our names to thisfspeciication.

PAUL P. RUIPIE.

WILLIAM A. SON'EN. 

